Ask Vietnam, Pakistan and even Korea: the era of steam coal is not over yet. Banks don't want to finance it, big miners are dropping it, and China is migrating to cleaner natural gas. But the shift to green fuels is slow, and Asia's demand for electricity is outpacing it. That will keep prices lofty for longer than many had forecast.

Global warming is on track to breach the toughest limit set in the Paris climate agreement by the middle of this century unless governments make unprecedented economic shifts from fossil fuels, a draft U.N. report said.

The "America's Pledge" report, presented on the sidelines of 200-nation talks on global warming in Bonn, Germany, said non-federal U.S. backers of the Paris pact accounted for $10.1 trillion or 54 percent of U.S. 2016 gross domestic product.

Syria, racked by civil war, and Nicaragua were the only two nations outside the 195-nation pact when it was agreed in 2015. Nicaragua's left-wing government, which originally denounced the plan as too weak, signed up last month.

The two-week global climate change talks with the attendance of diplomats of 197 nations and thousands of non-state actors and green activists opened in this German city on Monday with a commitment to go ahead of the 2015 Paris Agreement pledges to counter climate change.

In 2015, 195 nations vowed to cap the rise of the Earth's average temperature at "well below" 2 degrees Celsius, and to make effort to hold the line at a 1.5 C but the Paris Agreement did not mandate how or when to hit those targets.

The Trump administration is moving to roll back the centerpiece of President Barack Obama's efforts to slow global warming, seeking to ease restrictions on greenhouse gas emissions from coal-fired power plants.

The Survey pointed out the multilateral climate regime will do well if financial resources are provided to assist developing countries to facilitate the pathway towards low GHG emissions and climate resilient development.

"More than 900 US businesses support keeping the US in the Paris Agreement, including 20 Fortune 500 companies. American businesses need the US government at the negotiating table to represent their interests," the 10 Senators wrote in a letter to Trump.

Emphasising that India will not backtrack from its commitment to a clean energy future, Prime Minister Narendra Modi said on Friday, "Paris or no Paris, it is our conviction that we have no right to snatch from our future generation their right to have a clean and beautiful earth."

The US is historically the largest emitter of greenhouse gases, and a major current emitter. Without its active and ambitious contribution, any action to combat climate change will be insufficient by a huge margin,“ says climate change expert.